DK40HST Start Problem

[cflacus]

I have a no-start problem with my DK40HSE, 2012 model year. It seems to be related to Stop Solenoid.

I have recently replaced the starter motor, and now the engine will crank, but not start.
Here are my symptoms:
1. When the key is turned to on, there is no clicking sound from the stop solenoid.
2. I can hear and feel a click in the start relay, but there is no similar click coming from the stop solenoid relay.
3. Both Start and Stop relays pass the resistance/continuity tests mentioned in the manual.
4. I have switched out the Stop relay just in case, with no effect.
5. The key switch passes continuity tests ok.
6. The Neutral, Low Range and High range dash lights work, as well as the battery, PTO, and Cruise lights.
7. The Glow plugs seem to be getting enough current.
8. All fuses check out as good.

So, does the Stop Solenoid need to be replaced, or is the problem in my Display Unit, which sends a signal to the Stop Relay? and how can I trouble shoot these? Could my problem be elsewhere?

I have started this new thread because this appears to be an electrical issue?
I'm sure no expert on electrical issues, so any help would be greatly appreciated.

Chris

 

[cflacus]

I've checked out the stop solenoid and injection pump.

The stop solenoid does not operate when removed, even thought 12 V are getting to pull coil (for 1 sec), and hold coil when key is ON and body grounded. The resistance on the two terminals measure 0.6 ohms and 14 ohms respectively (The book says these should read .3 and 28 ohms).

With the oil fill plate removed, I can move the injection pump plunger freely.

It sound like with correct voltage to the solenoid, it must be bad if not visibly working properly? Do these go bad frequently?

Any suggestions greatly appreciated.

 

[Billrog]

I never replaced one on a tractor but a few on backhoes . The first one replaced by a dealer because I was in the middle of a job in a hurry cost me $450 the second one I bought on Ebay and replaced it for $56.
Another option is to rig up a manual shut off eg. with a choke cable or haywire.

 

[ritcheyvs]

I've checked out the stop solenoid and injection pump.

The stop solenoid does not operate when removed, even thought 12 V are getting to pull coil (for 1 sec), and hold coil when key is ON and body grounded. The resistance on the two terminals measure 0.6 ohms and 14 ohms respectively (The book says these should read .3 and 28 ohms).

With the oil fill plate removed, I can move the injection pump plunger freely.

It sound like with correct voltage to the solenoid, it must be bad if not visibly working properly? Do these go bad frequently?

Any suggestions greatly appreciated.

Are you certain that the case of the solenoid was connected to the engine block when you checked it while removed? That is essential to complete the circuit to the coils.

The resistances you measured are reasonable, Could the plunger be jammed within the SS? You can also try applying 12V directly to the pull coil terminal on the SS (with the SS case grounded to the block) to see if the plunger retracts. But if the plunger will not retract with 12v applied (jumper to battery + post, case grounded) you can be sure the solenoid is somehow bad. If so, go ahead and order one; MIE shows solenoids at about $80 plus shipping.

FYI, this will be the first case of a confirmed Kioti SS failure that I have seen on TBN. Maybe it's more common but rarely reported, but I doubt it.

Also, FYI, replacing the SS is MUCH cheaper and easier that replacing the injection pump, so it's good the IP isn't jammed.

 

[cflacus]

Yes, I grounded the SS body by holding it to the engine block, and also tried by jumpering it to the block. I encountered another post here indicating the SS part number I have, E6850-60012, might be one of a bad batch that was produced around 2010 or so. The production date on mine is 2010-12-23. The poster had his replaced by Kioti under warrantee, but mine is no longer covered. Guess I'll order on tomorrow. Sure am glad its not the injection pump!

Thanks for your help. I'll post the results here.